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273 lines
6.8 KiB
273 lines
6.8 KiB
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "lights"
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#define DEBUG 1
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#include <log/log.h>
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#include <malloc.h>
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#include <stdint.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <hardware/lights.h>
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/******************************************************************************/
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static pthread_once_t g_init = PTHREAD_ONCE_INIT;
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static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
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char const *const LCD_FILE = "/sys/class/leds/lcd-backlight/brightness";
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char const *const RED_LED_FILE = "/sys/class/leds/red/brightness";
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char const *const GREEN_LED_FILE = "/sys/class/leds/green/brightness";
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char const *const BLUE_LED_FILE = "/sys/class/leds/blue/brightness";
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char const *const RED_TIMEOUT_FILE = "/sys/class/leds/red/on_off_ms";
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char const *const GREEN_TIMEOUT_FILE = "/sys/class/leds/green/on_off_ms";
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char const *const BLUE_TIMEOUT_FILE = "/sys/class/leds/blue/on_off_ms";
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char const *const RGB_LOCKED_FILE = "/sys/class/leds/red/rgb_start";
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/**
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* device methods
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*/
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void init_globals(void)
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{
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// init the mutex
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pthread_mutex_init(&g_lock, NULL);
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}
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static int write_int(char const* path, int value)
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{
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int fd;
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static int already_warned = 0;
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fd = open(path, O_RDWR);
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if (fd >= 0) {
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char buffer[32] = {0,};
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int bytes = snprintf(buffer, sizeof(buffer), "%d\n", value);
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int amt = write(fd, buffer, bytes);
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close(fd);
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return amt == -1 ? -errno : 0;
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} else {
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if (already_warned == 0) {
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ALOGE("write_int failed to open %s\n", path);
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already_warned = 1;
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}
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return -errno;
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}
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}
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static int write_on_off(char const* path, int on, int off)
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{
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int fd;
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static int already_warned = 0;
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fd = open(path, O_RDWR);
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if (fd >= 0) {
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char buffer[32] = {0,};
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int bytes = snprintf(buffer, sizeof(buffer), "%d %d\n", on, off);
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int amt = write(fd, buffer, bytes);
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close(fd);
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return amt == -1 ? -errno : 0;
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} else {
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if (already_warned == 0) {
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ALOGE("write_int failed to open %s\n", path);
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already_warned = 1;
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}
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return -errno;
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}
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}
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static int rgb_to_brightness(struct light_state_t const* state)
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{
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int color = state->color & 0x00ffffff;
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return ((77 * ((color >> 16) & 0x00ff))
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+ (150 * ((color >> 8) & 0x00ff)) + (29 * (color & 0x00ff))) >> 8;
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}
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#if TEST_COMPLEX_CFG
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void simple_recursion(int recursion) {
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if (recursion == 0) return;
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ALOGE("simple_recursion %d", recursion);
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simple_recursion(recursion - 1);
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}
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#endif
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static int set_light_backlight(struct light_device_t* dev __unused,
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struct light_state_t const* state)
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{
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int err = 0;
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int brightness = rgb_to_brightness(state);
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pthread_mutex_lock(&g_lock);
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err = write_int(LCD_FILE, brightness);
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pthread_mutex_unlock(&g_lock);
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#if TEST_COMPLEX_CFG
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simple_recursion(10);
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#endif
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return err;
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}
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static int set_light_locked(struct light_state_t const* state, int type __unused)
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{
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int red, green, blue;
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int onMS, offMS;
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unsigned int colorRGB;
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switch (state->flashMode) {
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case LIGHT_FLASH_TIMED:
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case LIGHT_FLASH_HARDWARE:
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onMS = state->flashOnMS;
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offMS = state->flashOffMS;
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break;
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case LIGHT_FLASH_NONE:
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default:
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onMS = 0;
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offMS = 0;
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break;
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}
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colorRGB = state->color;
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#if DEBUG
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ALOGD("set_light_locked mode %d, colorRGB=%08X, onMS=%d, offMS=%d\n",
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state->flashMode, colorRGB, onMS, offMS);
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#endif
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red = (colorRGB >> 16) & 0xFF;
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green = (colorRGB >> 8) & 0xFF;
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blue = colorRGB & 0xFF;
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// due to limitation of driver
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if (onMS == 0) {
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red = 0;
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green = 0;
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blue = 0;
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}
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write_int(RGB_LOCKED_FILE, 0);
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write_int(RED_LED_FILE, red);
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write_int(GREEN_LED_FILE, green);
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write_int(BLUE_LED_FILE, blue);
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write_on_off(RED_TIMEOUT_FILE, onMS, offMS);
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write_on_off(GREEN_TIMEOUT_FILE, onMS, offMS);
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write_on_off(BLUE_TIMEOUT_FILE, onMS, offMS);
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write_int(RGB_LOCKED_FILE, 1);
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return 0;
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}
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static int set_light_notifications(struct light_device_t* dev __unused,
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struct light_state_t const* state)
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{
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pthread_mutex_lock(&g_lock);
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set_light_locked(state, 0);
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pthread_mutex_unlock(&g_lock);
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return 0;
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}
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static int set_light_attention(struct light_device_t* dev __unused,
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struct light_state_t const* state)
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{
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pthread_mutex_lock(&g_lock);
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set_light_locked(state, 1);
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pthread_mutex_unlock(&g_lock);
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return 0;
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}
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/** Close the lights device */
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static int close_lights(struct light_device_t *dev)
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{
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if (dev)
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free(dev);
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return 0;
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}
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/******************************************************************************/
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/**
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* module methods
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*/
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/** Open a new instance of a lights device using name */
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static int open_lights(const struct hw_module_t* module, char const* name,
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struct hw_device_t** device)
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{
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int (*set_light)(struct light_device_t* dev,
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struct light_state_t const* state);
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if (!strcmp(LIGHT_ID_BACKLIGHT, name))
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set_light = set_light_backlight;
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else if (!strcmp(LIGHT_ID_NOTIFICATIONS, name))
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set_light = set_light_notifications;
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else if (!strcmp(LIGHT_ID_ATTENTION, name))
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set_light = set_light_attention;
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else
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return -EINVAL;
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pthread_once(&g_init, init_globals);
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struct light_device_t *dev = malloc(sizeof(struct light_device_t));
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if(!dev)
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return -ENOMEM;
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memset(dev, 0, sizeof(*dev));
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dev->common.tag = HARDWARE_DEVICE_TAG;
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dev->common.version = 0;
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dev->common.module = (struct hw_module_t*)module;
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dev->common.close = (int (*)(struct hw_device_t*))close_lights;
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dev->set_light = set_light;
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*device = (struct hw_device_t*)dev;
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return 0;
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}
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static struct hw_module_methods_t lights_module_methods = {
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.open = open_lights,
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};
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/*
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* The lights Module
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*/
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struct hw_module_t HAL_MODULE_INFO_SYM = {
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.tag = HARDWARE_MODULE_TAG,
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.version_major = 1,
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.version_minor = 0,
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.id = LIGHTS_HARDWARE_MODULE_ID,
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.name = "lights Module (VTS instrumented)",
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.author = "Google, Inc.",
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.methods = &lights_module_methods,
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};
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